pxsmlx

ˈpɪks mɪlks'

A mixin library to make writing responsive CSS simple.

About

Do you nest media queries inside elements in SCSS, but get sick of writing out media queries for small responsive changes, especially if you need multiple? This is a set of mixins designed to reduce that work by condensing it down to as concise a syntax as possible, by baking in some assumptions.

pxsmlx is opinionated — it only uses min-width queries and Bootstrap breakpoints (plus an extra one at 1440px). But it allows you to write complex sets of media queries much more quickly.

  // You write...
  div.responsive {
    @include pxsmlx(width, 100px, 200px, 300px, 400px, 500px);
  }

  // And it generates...
  div.responsive {
    width: 100px;
  }
  @media (min-width: 576px) {
    div.responsive {
      width: 200px;
    }
  }
  @media (min-width: 768px) {
    div.responsive {
      width: 300px;
    }
  }
  @media (min-width: 992px) {
    div.responsive {
      width: 400px;
    }
  }
  @media (min-width: 1200px) {
    div.responsive {
      width: 500px;
    }
  }

Installation

  $ npm i pxsmlx

Usage

  @import '~/node_modules/pxsmlx/pxsmlx';

pxsmlx stands for property, xs, sm, md, lg, and xl. It's a shorthand to help you remember the mixin arguments. You can use any combination of breakpoints within that set: pxsm, psm, psmlx, etc.

First, set your breakpoints, if they differ from the default Bootstrap breakpoints. They're the variables at the top.

$mixin-sm-min-width: 768px;
$mixin-md-min-width: 992px;
$mixin-lg-min-width: 1200px;
$mixin-xl-min-width: 1440px;

A note about code size

This library adds media queries that contain a single selector, which may inflate the size of your CSS versus combining them. Available evidence, however, indicates that if you serve your files with Gzip the difference is negligible because of the repetitive nature of media queries allowing Gzip to mostly nullify their weight.

If you're still concerned, you can use a tool like PostCSS MQPacker to combine media queries at compile time. This may cause problems if you're doing a lot of overwriting down the cascade, instead of using a low-specificity methodology like BEM or Atomic CSS (which is recommended).

Ultimately, you have to determine whether the extra bytes are a tradeoff worth making. You may find that the most efficient way to use pxsmlx is selectively, when you need to inject a set of breakpoint styles for a single property here and there. If you're changing several properties at once, you may be better off writing a normal media query rather than including a pxsmlx mixin several times in a row.

License

• MIT